It provides three normally open (NO) instantaneous contacts with no leading, lagging, delayed, or make-before-break switching — a straightforward 3-pole NO block for extending the auxiliary contact set on a main contactor or for standalone logic switching. The IP20 front protection means it's safe from finger contact but requires enclosure protection against moisture and dust.
The switching capacity varies significantly with voltage: at 24 V it handles 10 A, at 230 V it handles 6 A, and at 690 V it handles 1 A. These are the thermal current ratings (Ith) for the auxiliary contacts — the maximum continuous current the contacts can carry at each voltage level. For a 24 VDC control circuit, the 10 A rating gives ample headroom for pilot lights, PLC inputs, and small relays. At 400 V, the 3 A rating covers most contactor coil circuits and signal isolation tasks. The mechanical life is 30 million operating cycles typical, which aligns with the SIRIUS S00 family standard for auxiliary contactors.
Mechanical integration and wiring
The 45 mm width and 57.5 mm height fit the S00 footprint, sharing the same DIN-rail clip pattern as the 3RT10 series power contactors. Wire capacity accepts solid conductors: 2x 0.5–1.5 mm², 2x 0.75–2.5 mm², or 2x 4 mm² per terminal. This covers most control wiring from 18 AWG to 12 AWG.
Environmental limits and shock resistance
Shock resistance is 10g for 5 ms and 5g for 10 ms — sufficient for most industrial machinery but not rated for high-g applications like presses or crushers without additional damping. The coil operates at 50/60 Hz with a voltage tolerance of 0.8–1.1 at 50 Hz and 0.85–1.1 at 60 Hz. This means the coil holds in reliably down to 80% of rated voltage at 50 Hz, which is standard for IEC contactors.
The product extension auxiliary switch option indicates that additional auxiliary contact blocks can be added to this base unit, expanding the contact count if needed. This is a standard SIRIUS feature — side-mounting blocks snap onto the contactor without tools.